Firebase Cloud Functions - Throw Auth Error-CodePudding

Is it possible to throw an Auth Error from HTTPs callble functions?

I mean, instead of this

 if (err.code === "auth/email-already-exists") {
    throw new functions.https.HttpsError(
      "invalid-argument",
      "The email address is already in use by other account"
    );
  }

something like

exports.signUp = functions
  .region("us-central1")
  .runWith({ memory: "2GB", timeoutSeconds: 120 })
   .https.onCall(async (data, context) => {
      ...

      if (err.code === "auth/email-already-exists") {
        throw err;
      }

      ...
   }

CodePudding user response：

Callable Functions should return an instance of HttpsError which requires gRPC error codes so the details of the error are properly transmitted to calling clients. If you throw a different error type, the client will only see a HttpsError with the code and message "internal" - no specifics will be sent to the client for safety.

If you want to pass through the error code of a Firebase Error, you can do so using the third argument. Also consider using "failed-precondition" (preferred) or "already-exists" (if it's a resource) instead.

if (err.code === "auth/email-already-exists") {
    throw new functions.https.HttpsError(
      "invalid-argument",
      "The email address is already in use by other account",
      { code: err.code }
    );
  }